How about Zhejiang Uniview Technology?

The company is quite strong.

Zhejiang Yushi Technology Co., Ltd. is a professional video surveillance product and solution supplier, committed to providing leading surveillance products and solutions and professional and high-quality services to customers in various industries around the world.

Uniview Technology invests more than 15% of its sales in R&D every year, with R&D personnel accounting for 50%. It has R&D institutions in Hangzhou and Shenzhen, China. By the end of 2012, Uniview Technology had held more than 350 patents.